Multiscale Simulation of Precipitation Over East Asia by Variable Resolution CAM‐MPAS
Abstract This study evaluates the precipitation over East Asia simulated by the variable resolution CAM‐MPAS featuring the Model for Prediction Across Scales (MPAS) atmospheric dynamical core coupled with the physics parameterizations of the Community Atmosphere Model (CAM) version 5.4. Two CAM‐MPAS...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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American Geophysical Union (AGU)
2021-11-01
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| Series: | Journal of Advances in Modeling Earth Systems |
| Subjects: | |
| Online Access: | https://doi.org/10.1029/2021MS002656 |
| _version_ | 1819126753094795264 |
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| author | Yuan Liang Ben Yang Minghuai Wang Jianping Tang Koichi Sakaguchi L. Ruby Leung Xin Xu |
| author_facet | Yuan Liang Ben Yang Minghuai Wang Jianping Tang Koichi Sakaguchi L. Ruby Leung Xin Xu |
| author_sort | Yuan Liang |
| collection | DOAJ |
| description | Abstract This study evaluates the precipitation over East Asia simulated by the variable resolution CAM‐MPAS featuring the Model for Prediction Across Scales (MPAS) atmospheric dynamical core coupled with the physics parameterizations of the Community Atmosphere Model (CAM) version 5.4. Two CAM‐MPAS experiments, one with a global quasi‐uniform resolution mesh of 120 km (MPAS‐UR) and the other with a variable resolution mesh of 30–120 km refined over East Asia (MPAS‐VR), are conducted from 1989 to 2005 following the Atmospheric Model Intercomparison Project protocol. Two regional climate model simulations at ∼25 km resolution from the Coordinated Regional Downscaling Experiment East Asia second plan are also analyzed for comparison. Results show that CAM‐MPAS performs better than the selected regional models in simulating the precipitation climatology over East Asia. Compared with MPAS‐UR, MPAS‐VR with refinement over East Asia better simulates the precipitation over and around the Tibetan Plateau (TP), the upper‐level circulation, the precipitation frequency and intensity in various regions of China, and the interannual precipitation pattern associated with the East Asian summer monsoon. Both decreased grid spacing and the use of finer‐scale terrain information contribute to the improvements in MPAS‐VR relative to MPAS‐UR. However, decreased grid spacing is more essential for simulating the precipitation magnitude over TP and the location of peak precipitation south of TP, likely due to the better resolved physical and dynamical processes associated with orographic precipitation. The 30–120 km CAM‐MPAS model is shown to be a promising tool for precipitation simulation over East Asia. |
| first_indexed | 2024-12-22T08:01:02Z |
| format | Article |
| id | doaj.art-8d0eed7d58b444d39916afc3edb68a86 |
| institution | Directory Open Access Journal |
| issn | 1942-2466 |
| language | English |
| last_indexed | 2024-12-22T08:01:02Z |
| publishDate | 2021-11-01 |
| publisher | American Geophysical Union (AGU) |
| record_format | Article |
| series | Journal of Advances in Modeling Earth Systems |
| spelling | doaj.art-8d0eed7d58b444d39916afc3edb68a862022-12-21T18:33:14ZengAmerican Geophysical Union (AGU)Journal of Advances in Modeling Earth Systems1942-24662021-11-011311n/an/a10.1029/2021MS002656Multiscale Simulation of Precipitation Over East Asia by Variable Resolution CAM‐MPASYuan Liang0Ben Yang1Minghuai Wang2Jianping Tang3Koichi Sakaguchi4L. Ruby Leung5Xin Xu6School of Atmospheric Sciences Nanjing University Nanjing ChinaSchool of Atmospheric Sciences Nanjing University Nanjing ChinaSchool of Atmospheric Sciences Nanjing University Nanjing ChinaSchool of Atmospheric Sciences Nanjing University Nanjing ChinaAtmospheric Sciences and Global Change Division Pacific Northwest National Laboratory Richland WA USAAtmospheric Sciences and Global Change Division Pacific Northwest National Laboratory Richland WA USASchool of Atmospheric Sciences Nanjing University Nanjing ChinaAbstract This study evaluates the precipitation over East Asia simulated by the variable resolution CAM‐MPAS featuring the Model for Prediction Across Scales (MPAS) atmospheric dynamical core coupled with the physics parameterizations of the Community Atmosphere Model (CAM) version 5.4. Two CAM‐MPAS experiments, one with a global quasi‐uniform resolution mesh of 120 km (MPAS‐UR) and the other with a variable resolution mesh of 30–120 km refined over East Asia (MPAS‐VR), are conducted from 1989 to 2005 following the Atmospheric Model Intercomparison Project protocol. Two regional climate model simulations at ∼25 km resolution from the Coordinated Regional Downscaling Experiment East Asia second plan are also analyzed for comparison. Results show that CAM‐MPAS performs better than the selected regional models in simulating the precipitation climatology over East Asia. Compared with MPAS‐UR, MPAS‐VR with refinement over East Asia better simulates the precipitation over and around the Tibetan Plateau (TP), the upper‐level circulation, the precipitation frequency and intensity in various regions of China, and the interannual precipitation pattern associated with the East Asian summer monsoon. Both decreased grid spacing and the use of finer‐scale terrain information contribute to the improvements in MPAS‐VR relative to MPAS‐UR. However, decreased grid spacing is more essential for simulating the precipitation magnitude over TP and the location of peak precipitation south of TP, likely due to the better resolved physical and dynamical processes associated with orographic precipitation. The 30–120 km CAM‐MPAS model is shown to be a promising tool for precipitation simulation over East Asia.https://doi.org/10.1029/2021MS002656variable resolutionprecipitationEast AsiaMPASGCM |
| spellingShingle | Yuan Liang Ben Yang Minghuai Wang Jianping Tang Koichi Sakaguchi L. Ruby Leung Xin Xu Multiscale Simulation of Precipitation Over East Asia by Variable Resolution CAM‐MPAS Journal of Advances in Modeling Earth Systems variable resolution precipitation East Asia MPAS GCM |
| title | Multiscale Simulation of Precipitation Over East Asia by Variable Resolution CAM‐MPAS |
| title_full | Multiscale Simulation of Precipitation Over East Asia by Variable Resolution CAM‐MPAS |
| title_fullStr | Multiscale Simulation of Precipitation Over East Asia by Variable Resolution CAM‐MPAS |
| title_full_unstemmed | Multiscale Simulation of Precipitation Over East Asia by Variable Resolution CAM‐MPAS |
| title_short | Multiscale Simulation of Precipitation Over East Asia by Variable Resolution CAM‐MPAS |
| title_sort | multiscale simulation of precipitation over east asia by variable resolution cam mpas |
| topic | variable resolution precipitation East Asia MPAS GCM |
| url | https://doi.org/10.1029/2021MS002656 |
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